1013585521 has 4 divisors (see below), whose sum is σ = 1091553652. Its totient is φ = 935617392.

The previous prime is 1013585519. The next prime is 1013585527. The reversal of 1013585521 is 1255853101.

1013585521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 47059600 + 966525921 = 6860^2 + 31089^2 .

It is a cyclic number.

It is not a de Polignac number, because 1013585521 - 2¹ = 1013585519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1013585527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38984046 + ... + 38984071.

It is an arithmetic number, because the mean of its divisors is an integer number (272888413).

Almost surely, 2^1013585521 is an apocalyptic number.

It is an amenable number.

1013585521 is a deficient number, since it is larger than the sum of its proper divisors (77968131).

1013585521 is an equidigital number, since it uses as much as digits as its factorization.

1013585521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77968130.

The product of its (nonzero) digits is 6000, while the sum is 31.

The square root of 1013585521 is about 31836.8579008670. The cubic root of 1013585521 is about 1004.5081530160.

The spelling of 1013585521 in words is "one billion, thirteen million, five hundred eighty-five thousand, five hundred twenty-one".